Cylinder-tooth.



No. 818,579. PATENTED FEB. 27, 1906.

L. P. PEDERSON.

CYLINDER TOOTH APPLICATION FILED JULY 10, 1905.

UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Application filed July 10. 1905. Serial No. 268,944.

To all whom, it may concern:

Be it known that I, LARS P. PEDERSON, a citizen of the United States, residing at Westbrook, in the county of Cottonwood and State of Minnesota, have invented certain new and useful Improvements in Oylinder- Teeth; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved cylinder tooth for threshingcylinders; and to this end it consists of the novel construction and arrangement of parts hereinafter described, and defined in the claim.

In carrying out my invention I have had two principal objects in viewto wit, first, to provide a tooth of increased efiiciency,

thereby insuring a more complete threshing action, and, second, to provide a reversible tooth which when worn away at one edge may be reversed edge for edge, thus greatly increasing the operative life of a tooth and reducing the cost of maintenance.

My improved tooth is illustrated in the ac companying drawings, wherein like characters indicate like parts throughout the several views. I

Referring to the drawings, Figure 1 is a detail view, in side elevation, showing a portion of a threshing-cylinder and illustrating one of my improved cylinder-teeth applied in working position thereto, the said parts being shown chiefly in side elevation, but some parts being sectioned. Fig. 2 is a transverse vertical section taken on the line 00 m of Fig. 1, and Fig. 3 is a section taken on the line a 01: of Fig. 1.

The letter a indicates one of the bands, and the letter b one of the bars, of a threshing-cylinder, which parts are provided with tapered seats 3, that are square in cross-section.

The numeral 1 indicates a cylinder-tooth,

the shank of which is tapered to fit the seat 3 and the stem of which is threaded and is provided with a nut 4. The construction so far described is that of an ordinary threshingcylinder and cylinder-tooth.

In acordance with my invention I form the blade of the cylinder tooth with laterallyoffset blade-sections 1*, that are connected at the central portions of the tooth by a longitudinally extended web portion 1 In side elevation the cylinder-tooth is bisymmetricalthat is, is formed with like outward curves-so that the tooth is adapted to work when either edge is turned forward or in the direction of the rotation of the cylinder. This, as is obvious, makes the tooth reversible.

It is also very important to note that the cylindertooth formed as above described is provided with two striking edges or surfaces, located the one ahead of the other, so that one tooth performs nearly or quite the work of two ordinary teeth. Otherwise stated, a cylinder equipped with these improved teeth would perform approximately the work of two ordinary cylinders.

The contour and cross-section of the tooth may be varied within the scope of my invention as long as it has the characteristics above set forth.

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

A reversible cylindertooth formed with laterally-ofiset blade portions 1 united by a web portion 1 providing the blade portions of said tooth with a plurality of laterally-offset striking edges or surfaces and making the same reversible, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

LARs P. PEDERSON.

I/Vitnesses:

C. A. ZIEsKE, J. A. SIvER'rsoN. 

